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Volume 5, Issue 1 (September 2016)
The Effect of Thermal Treatment on Microstructure and Corrosion of Nickel Base Alloy 690 (UNS N0 6690)
(Received 7 April 2016; accepted 13 July 2016)
Published Online: 27 September 2016
CODEN: MPCACD
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Alloy 690 in the thermally treated (TT) condition is an advanced steam generator tubing material. The effect of thermal ageing treatments on the intergranular corrosion (IGC) behavior of the alloy was probed. Isothermal ageing was carried out at 600, 700, and 800°C with varying ageing time. Morphology of the carbides was studied as a function of thermal treatment temperature and duration. The carbides morphology was observed to affect the IGC resistance. Grain boundaries devoid of carbides (solutionized condition) or with coarse carbide particles (formed at 800°C) enhanced IGC resistance, whereas dendritic fine carbides formed at lower ageing temperature yield inferior IGC resistance.
Author Information:
Santra, S.
Nuclear Fuel Complex, ECIL, Hyderabad,
Ramana Rao, S. V.
Nuclear Fuel Complex, ECIL, Hyderabad,
Kapoor, K.
Nuclear Fuel Complex, ECIL, Hyderabad,
Stock #: MPC20160046
ISSN:2165-3992
DOI: 10.1520/MPC20160046
AuthorTitle The Effect of Thermal Treatment on Microstructure and Corrosion of Nickel Base Alloy 690 (UNS N0 6690)
Symposium ,
Committee G01